Garmin LIDAR-Lite v4 LED-光學距離測量傳感器 具備 QwIIC 接口 新版PCB 版本 IIC 通訊

描述

Garmin LIDAR-Lite v4 LED-光學距離測量傳感器 具備 QwIIC 接口

Garmin LIDAR-Lite v4 LED-光學距離測量傳感器 是一款高性能的無線光學測距傳感器，無需任何焊接即可上手。當空間狹窄且功率有限時，這是無人機，機器人，物聯網或無人駕駛車輛的理想解決方案。該傳感器的最大量程為10米，分辨率為1cm，在數據採集過程中需要85mA的電流。用戶可以使用I ² C協議讀寫LIDAR-Lite v4 。這就是SparkFun Qwiic系統真正令人讚嘆的地方。LIDAR傳感器需要5V的電壓才能運行，但要在3V3的邏輯上運行。借助5V升壓電路和易於使用的Qwiic連接器，您可以通過單個硬件為傳感器供電並通過Qwiic獲得距離測量。

Garmin LIDAR-Lite v4 LED-光學距離測量傳感器 的工作原理是發出紅外光束並測量其反射回來所需的時間。LIDAR-Lite v4使用LED而非激光進行此迭代。因此，在正常使用情況下，本質上是對眼睛安全的。內置的nRF52840微控制器運行一個預裝的“開箱即用”的庫存應用程序，以計算其自身與前面的物體之間的距離。配備的nRF52840還允許開發人員創建自定義應用程序，以擴展“開箱即用”功能，或連接到運行自定義用戶應用程序的外部微控制器。

SparkFun LIDAR精簡版V4的Arduino庫使得獲取的數據一樣簡單到getDistance的（）函數的調用。該庫還支持更改每個LIDAR的I ² C地址，並提供了一個簡單的示例。它的低功耗和I ² C地址配置意味著您可以在一個微控制器平台上菊花鍊式連接多達10個此類傳感器。

特色與規格

• 分辨率：1cm
• 測量重複性：
  • 在室內測量到90％的反射目標
  • 1cm相當於一個標準偏差
  • 使用“高精度”模式，平均：
    • +/- 1cm至2米
    • +/- 2厘米至4米
    • +/- 5厘米至10米
• 範圍：5厘米至10米（從設備背面測量）
• 更新率：
  • I ² C => 200Hz（典型值）
  • ANT®=在正常工作模式下2m處室內達到90％目標時高達200Hz
• 接口：I ² C或ANT；用戶可以使用Nordic SDK為SPI配置
• 功率（工作電壓）：3.3VDC
• 工作溫度：-20至60°C
• LED波長：940nm
• 光束髮散角：4.77°
• 光學孔徑：14.9mm
• 單位尺寸（長x寬x高）：2.8英寸x 1.0英寸x 0.9英寸

文件與資源

• 原理圖
• 鷹文件
• 板子尺寸
• 聯播指南
• Garmin LIDAR Lite v4產品信息：
  • Garmin：操作手冊和技術規格
  • Garmin：安全和產品信息
  • Garmin：LIDAR-Lite Arduino庫Github
  • Garmin：LIDAR-Lite ANT庫
• 英國威廉希爾SparkFun：Qwiic LIDAR Lite v4 Arduino庫
• Qwiic信息頁面
• GitHub硬件回購

Garmin LIDAR-Lite v4 LED – Distance Measurement Sensor (Qwiic)

The LIDAR-Lite v4 Qwiic from GARMIN is a high-performance, wireless optical distance measurement sensor that doesn’t require any soldering to get started. This is the ideal solution for drone, robot, IoT, or unmanned vehicle operations when space is tight and power is limited. This sensor has up to a 10 meter range, 1cm resolution, and requires 85mA during data acquisition. The user can read and write to the LIDAR-Lite v4 using the I²C protocol; this is where the addition of the SparkFun Qwiic system really shines. The LIDAR sensor requires 5V to operate but runs on 3V3 logic. With a 5V boost circuit and an easy-to-use Qwiic connector you can power the sensor and get distance measurements over Qwiic all with a single piece of hardware.

The LIDAR sensor works by sending out an infrared beam and measuring the time it takes to be reflected back. The LIDAR-Lite v4 utilizes LEDs rather than a laser for this iteration; therefore, it is inherently eye-safe under normal usage. The built-in nRF52840 microcontroller runs a pre-loaded “out of the box” stock application to calculate the distance between itself and something in front of it. The equipped nRF52840 also allows developers to create custom applications to expand on the “out of the box” functionality or connect to an external micro-controller running a custom user application.

The SparkFun LIDAR Lite v4 Arduino library makes getting data as easy as a call to the getDistance() function. The library also supports changing the I²C address of each LIDAR and provides an easy example of how to do so. Its low power-consumption and I²C address configuration means you can daisy-chain up to 10 of these sensors on one microcontroller platform.

Note: The I²C address of the Qwiic LIDAR-Lite v4 is 0x62 and is software-configurable to any address. A multiplexer/Mux is required to communicate to multiple Qwiic LIDAR-Lite v4 sensors on a single bus. If you need to use more than one Qwiic LIDAR-Lite v4 sensor consider using the Qwiic Mux Breakout.

Features

• Resolution: 1cm
• Measurement repeatability:
  • As measured indoors to a 90% reflective target
  • 1cm is equivalent to one standard deviation
  • Using “high accuracy” mode, with averaging:
    • +/- 1cm to 2 meters
    • +/- 2cm to 4 meters
    • +/- 5cm to 10 meters
• Range: 5 cm to 10 meters (as measured from back of unit)
• Update rate:
  • I²C = >200Hz typical
  • ANT® = up to 200Hz to a 90% target indoors at 2m in normal operating mode
• Interface: I²C or ANT; user configurable for SPI using the Nordic SDK
• Power (operating voltage): 3.3VDC
• Operating temperature: -20 to 60° C
• LED wavelength: 940nm
• Beam divergence: 4.77°
• Optical aperture: 14.9mm
• Unit size (LxWxH): 2.8in x 1.0in x 0.9in